Yes, but not immediately and not reliably.
You are transported there at the end of your turns(50÷ chance) and transported back from the ethereal plane at the start of your next turn. To ready an action, you have to use an action (on your turn) to ready an action that will take place before the start of your next turn and casting blink is an action.
So the sequence can be something like: action, cast blink -> at the end of your turn 50÷ chance to blink - success -> you pop into the ethereal plane, but can do nothing, since you have no readied action, but the creature is aware of you -> next turn, use action to ready action to attack in ethereal -> 50÷ chance fails, readied action wasted since trigger condition is not met -> next turn, use your action to ready an action again -> 50÷ succeeds -> now you try to perform your readied action, but the creature might have wised up in the meantime and moved more than 60 ft away, in which case you can't see it and the readied action is wasted again.
A much better RAW compliant(IMO) way to use this would be too have a party member(s) climb into a bag of holding since your items come with you, ready an action to quickly turn the bag of holding inside out and therefore empty it as soon as you blink in, have them do their stuff and then at an agreed upon future time have them waiting inside the bag so you can blink in with a ready action to pick it up.